ThinkFun Gravity Maze Marble Logic Game STEM Toy Complete GR200 Put your visual perception and reasoning skills to the test with Gravity Maze by ThinkFun! This gravity-powered marble run and STEM logic puzzle is a 2015 Toy of the Year winner designed to challenge single players from age 8 to adult. It features 60 logic grid challenges ranging from beginner to expert difficulty. The box is in clean, excellent condition with minimal shelf wear. All multi-level towers, marbles, target piece, and challenge cards are clean, complete, and ready for head-to-head or solo brain-teasing fun. #ThinkFun #GravityMaze Recommended Price: $15